Ever since I was a kid, I've liked playing with Legos . I probably spent countless hours of my youth building, tearing apart, and re-building all sorts of cars, airplanes, and spaceships (none of this pansy house-building for me). I still have a bucket of them sitting in my room, and every time I break them out, I get a little nostalgic. Besides, it's just plain fun for my inner tinkerer/geek. Technically, these are children's toys. You don't want babies near them, because they might swallow the pieces; children of about three years old, though, can usually handle the whole concept. And coincidentally, there just so happen to be kids of that age floating around my house at times. Most of the time, I just help them build stuff that they're working on. Sometimes they still have trouble with snapping together pieces, so I help with that. Other times, they don't understand how gravity works, so I help to provide structural support to their c...